<template>
  <div class="BaseimgPicker">
    <img class="layer-select-img" :src="layerSelectImgSrc" alt="" title="选择底图" @click="layersSelectClick" />
    <div v-show="layersSelectShow" class="layers-select">
      <i class="el-icon-close" @click="layersSelectClick"></i>
      <div class="layers-select-title">底图</div>
      <ul>
        <li
          v-for="(item, index) in layersList"
          :key="index"
          class="layers-select-li"
          :class="{ liSelected: index === currentLayerIndex }"
          @click="changeLayer(index, item.option)"
        >
          <img :src="item.img" alt="" />
          <p>{{ item.option.name }}</p>
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      layerSelectImgSrc: 'images/layerSelect.png',
      layersSelectShow: false,
      currentLayerIndex: 4,
      layersList: [
        {
          img: 'images/中国地图彩色版.png',
          option: {
            type: 'wmts',
            name: '中国地图彩色版',
            url: 'http://map.geoq.cn/arcgis/rest/services/ChinaOnlineCommunity/MapServer/WMTS',
            layer: 'ChinaOnlineCommunity',
            tileMatrixSetID: 'default028mm'
          }
        },
        {
          img: 'images/中国地图暖色版.png',
          option: {
            type: 'wmts',
            name: '中国地图暖色版',
            url: 'http://map.geoq.cn/arcgis/rest/services/ChinaOnlineStreetWarm/MapServer/WMTS',
            layer: 'ChinaOnlineStreetWarm',
            tileMatrixSetID: 'default028mm'
          }
        },
        {
          img: 'images/中国地图蓝黑版.png',
          option: {
            type: 'wmts',
            name: '中国地图蓝黑版',
            url: 'http://map.geoq.cn/arcgis/rest/services/ChinaOnlineStreetPurplishBlue/MapServer/WMTS',
            layer: 'ChinaOnlineStreetPurplishBlue',
            tileMatrixSetID: 'default028mm'
          }
        },
        {
          img: 'images/中国地图灰色版.jpg',
          option: {
            type: 'wmts',
            name: '中国地图灰色版',
            url: 'http://map.geoq.cn/arcgis/rest/services/ChinaOnlineStreetGray/MapServer/WMTS',
            layer: 'ChinaOnlineStreetGray',
            tileMatrixSetID: 'default028mm'
          }
        },
        {
          img: 'images/谷歌影像地图.png',
          option: {
            type: 'urlTemp',
            name: '谷歌影像地图',
            url: 'http://mt1.google.cn/vt/lyrs=s&hl=zh-CN&x={x}&y={y}&z={z}&s=Gali'
          }
        }
      ]
    }
  },
  methods: {
    startFun() {
      this.$earth.addToolbarButton()
      this.$earth.addPlanePath()
    },
    ClearPlan() {
      this.$earth.removePlane()
    },
    ClearTool() {
      this.$earth.removeToolbarButton()
    },
    layersSelectClick() {
      this.layersSelectShow = !this.layersSelectShow
      if (this.layersSelectShow) {
        this.layerSelectImgSrc = 'images/layerSelected.png'
      } else {
        this.layerSelectImgSrc = 'images/layerSelect.png'
      }
    },
    changeLayer(index, option) {
      this.currentLayerIndex = index
      this.$earth.changeBaseLayer(option)
      this.layersSelectClick()
    }
  }
}
</script>

<style lang="scss" scoped>
.BaseimgPicker {
  .layer-select-img {
    width: 30px;
    position: absolute;
    bottom: 0px;
    right: 0px;
    z-index: 1;
    cursor: pointer;
    margin: 3px;
  }
  .layers-select {
    width: 250px;
    height: 400px;
    position: absolute;
    bottom: 36px;
    right: 8px;
    z-index: 1;
    background: #222222;
    color: #bdbdbd;
    .el-icon-close {
      position: absolute;
      top: 0px;
      right: 6px;
      line-height: 30px;
      cursor: pointer;
    }
    .layers-select-title {
      height: 30px;
      background: #333333;
      line-height: 30px;
      text-align: center;
      font-size: 14px;
    }
    .layers-select-li {
      display: inline-block;
      width: 42%;
      margin: 10px;
      font-size: 14px;
      cursor: pointer;
      img {
        width: 100px;
      }
      p {
        margin-top: 3px;
        text-align: center;
      }
    }
    .liSelected {
      color: #00dcff;
    }
  }
}</style
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